Hello and thanks for your question; it's a good one.
The things we know for sure that affect the course of macular degeneration are as follows:
1. Eating a well-balanced, healthy diet and exercising regularly provide the best lifestyle protection against age-related macular degeneration (ARMD) worsening.
2. Taking the AREDS vitamin supplement that you are likely taking is also crucial to slowing the progression of vision loss and decreasing the incidence of severe vision loss from ARMD. However, it is important to take the supplement (# of pills and # of times per day) as it states on the supplement bottle; some people take less # of pills or take it less times per day than is recommended, but with an altered regimen, the efficacy of these vitamins may be suspect. Additionally, if you have ever smoked before, it is important to make sure that you're not taking an AREDS supplement with vitamin A or beta-carotene (those are synonyms) in it; this can increase your risk of lung cancer if you've smoked and are taking this vitamin.
3. Also, smoking increases your risk of worsening ARMD so stopping smoking would be important.
4. Lastly, protect your eyes from UV exposure by wearing sunglasses while outside in the sun.
Those are the only things that have been proven to affect the course of ARMD.
Does this information help address your concerns? Does this make sense? Do you have any other concerns that I haven't addressed?
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My opinion is solely informative and does not constitute a formal medical opinion or recommendation. For a formal medical opinion and/or recommendation you must see an eye doctor.